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RE: What is this rock?

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What is this rock?

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sooflauschig (59) in rockhound • 7 years ago (edited)

Looks like some kind of limestone nodule.
The inside seems to be made of of crinoids stems.

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They fall apart into those little disks.

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7 years ago by sooflauschig (59)

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dudeboblives (25) · 7 years ago

Thanks for the reply! Very nice pics, also. I forgot to mention in the post that the outside layer is agate. For a better description of the stuff on the inside, it’s a mass of little balls, and the ones that are broken in half are what look like the crinoid stems.

I have a saw to cut this in half for a better look, but I want to gain a better understanding of it in case cutting it up would devalue it.

Thanks again :)

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sooflauschig (59) · 7 years ago

Are you saying the inside is made up of balls rather than disks?

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dudeboblives (25) · 7 years ago

Here’s a better pic of the insides. The wet part in the upper corner is where I just tested it with vinegar.

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